baumann



K. BAUMANN. AXIAL FLOW STEAM TURBINE APPLICATION FILED MAR. 19. 19'9.

1,322,222. I Patented Nov. 18, 1918).

a SHEETS-SHEET INVENTOR.

BY mun/Mm i TTBRNEYS,

lzt ivnxwl Nov. 18, 1919.

a $HEETS--SHEET 2 ATTORNEYS.

K. BAUMANN.

AXIAL F'LOW SHAM TURBiNE.

APPLICAHON FlLED MAR: 19 13119.

iziivnimi NM lb, 191%.

a SHEETS sum 3.

INVENTOR.

BY M ATTORNEYS.

ens

E FIGE.

KARL BAUMANN 01E URMS'IQN, ENGLAND, ASSIGNQH, 330 THE EBEIZTZfiH WEEETINGHOUSE ELECTRIC AND MAMUFAC'EUEING UBHLPANY, LIMITED, ill. filliMl AKY OF GREAT BRITAIN. I

on heel nicotine filed nnvust 223 5.91? Serial No. 187,853.

Epecification of Letters Axiell low Steam-'lurhilies, of which. the

following; is a specification.

This invention i'elates to steam turbines of the axial flow type in which the volume of steam leaving the i must blades is considciable and con. u ntly the exhaust cesings and outlets are of considerable elm.

Where :1 turbine of this type supported directly on its loiuulal'ion from its exhaust casing and the vertical height the supporting feet is considerable. the vertical pansion of the exhaust casing during "the Operation of the turbine may on occasions he such as would lift the high pressure end of the cylinder to which the feet are not directly attached to such an extent as to raise the bearing pedestal at the high pressure end of the turbine from its hedqilete. This will particularly be the case where the oven hung portion of the cylinder is relaively short and rigid and is attached to the hear-- ing pedestal. Where a turbine runs contin uously at high vacuuin' the. ez ioan on ferred to will usuall not went to T 4 l I produce the undesirable chem. descrioeo. one Where the turbine has to be capable oi? run-- uing at times non-condenh this ex tmnsion may be great enough to give rise the dif 'licult-y mentioned.

ln order to overcome "this difiiculty the turbine is, according "to this invention, providedwith means for .introdncinea limited degree of flexibility between the overhung portion of the cylinder and the exhaust casing which is directly sui iported from the foundations.

In order that the invention may he clearly understood two constructional forms which. it may assume will now be described with reference to the accompanying drawings in which Figure 1 is a central, longitudinal. vertical section and Fig. 2 a plan View of the lower portion of a turbine cylinder and exhaust easing constructed in. accordance with this invention. Fig. 3 being, as to its left hand half a cross-section taken on the line VIII-VHL and as to its right hand half on the line 1X-lli of Fig.1, and Rig 4; being to its left hand portion an end VlQW looking in th direc ion of the arrow of 1, and as to its right hand portion a section on the line X X. o Fig. l. Fig. 5 detail View on the line -11 of Fig. 1. i 7

l 2 i1 f gs. 6 a views s1 lar to Figs. 1 and 8 as to its leiit hand end View loosing in the direction of the arrow of l 6, and as to its right hand portion at section on. the line ;.llll-XlH of Fig. 6 the turbine, cylinder removed. The f-LQClLlOl'i in lion of i'oni which various sectional views are taken and the same reference mun .Qs are used to refer to like parts throughoiu the seversl figures oi the drawlogs.

Referring now to Figs. 1 to 5 the turbine cylinder indicated. at 1+2 casing at 15. The'heering pedestal for the shaft hearing the high. pressure end of the turbine is ii'idicaled st 16, the shaft bearing 17' at the low pressure end being; supported,

shown from the lower half of the exhaust cosine; I

The exhaust casin is here shown as being provided with a diaphragm 18, the upper edge 19 of which extends across the exhaust casing near the linal of moving blades; and :ates the st I flowing from the upp r half of such ha through the exhaust casing from. a l flowing from the lower half of su n blades through the en ia-ust co 7 Well lfliO ent invention.

The li'iivei' hell? the exhaust casing is provided with two internal Webs 20, 21 extending, as shown, across-the exhaust casing in a direction substantially parallel with the turbine shaft and the turbine is supported in position on its foundations 22 by feet located respectively at the, high pressure and low pr-sssure end of the exhaust casing 15.

The overhung portion of the cylinder is connected at the highv pressure end by a semi-circular portion 25 With the pedestal. 16 supporting the shaft hearing at this end. This connection is provided not for the purpose of supporting the overhung portion of the cylinder lei. but chiefly for the purpos of maintaining this part of the cylsind the exhaust New. 18. 1919..

:ut show so. elteinative construction; portion being an looting li o show the direcinder in its proper position relative to the shaft so that the clearances between the stator and the rotor of the turbine may be 927 which connects the turbine cylinder-'1;

with the exhaust casing and may. be cast integral with the high pressure portion of the cylinder and the exhaust casing, or may be made separately and attached thereto as may be found most convenlent. The Webs 2G and 31ers, as shown in the right hand. lieu of: Fig; 3, continued through thelower portion of the expansion belt 27 and Where' they join the upper portion of the support ing feet 23 constitute a fixed point between the exhaust casing 15 and the overhung portion of the turbine cylinder 'l'e' Such by the feet and the overhung; nortioii o. cylinder not directly supported from a fined joint is necessary in order to provide su cient rigid ty to prevent enpan sic-n. on the turbine m an axial direction,

fill other points of the periphery of the cylinder More, however, capable of a limited amount movement and should the vertical expansion mentioned. above take place the two divided portions of the cylinder surrounded by the expansion belt :2? at the upper half of the turbine will .be caused to separate and at the bottom half to approach eachother. In this way the exhaust casing; v 15 and its supporting feet Q3 may-expand in a vertical direction Without causing the bearing pedestal 16 to" be raised from its bed-plate.

The expansion belt 27 may alsol' rle utilized for conducing away steam from a low pressure portion of the turbine for heating or for other purposes or as an inlet for low pressure steam.

Although the circumferential division of the turbine cylinder 14 is shown in l igs, ii. to l as being between two portions of the turbine cylinder it is to be understood that this division may be made between the turbins cylinder and the ethanol, casing. The reinentioned flexibility must, however, introduced point het'ween t our time of the exhaust cashing rigidly s: i i

feet.

in the alternative construction illus a in Figs. 6 to 8 the requisite lie 'ihility tween exhaust l5 and over hung portion oi the cylinder is is sr-acurcd 'K i. w? .i 3v mending the censure casing it Wltll a .lar diaphragm 30.

vertical facing 28 and forming: a tiangefiifl around the cylinder Li and connecting the lacing, 28 and flange :29 by a flexible annu- With this construction, in order to secure sufficient rigidity in an axial direction, struts or the like may be provided between the cylinder 1 and the exhaust casing 15 and so connected there-' with that While permitting of a, relative tilting movement taking place between the parts connected by the annular diaphragm 39 they Will resist any thrust in an axial-direction. In the construction shown in. Figs. 6 t0 8, however, rigidity in an axial direction is secured by providing ribbed extensions 31 preiierablynear the horizontal joint on the flange 29. These extensions extend across the annular diaphragm and are secured to said diaphragm and to the facing 28 on the exhaust cosin The arrangement herein'above described, two forms of which are illustrated by Way of example in the figures oft/he accompanying drawings in which to secure flexibility an expansion. belt or diaphragm is provided between divided portions of the cylinder or between the cylinder and the exhaust casing,

applicable to turbines having exhaust casings of various forms. For example, this arrangement may advantageously be enrformed, I declare tl'iat What. l claim is:

"Ill

1. Turbine apparatus comprising in com bination an exhaust casing and a turbine cylinder flexibly attached thereto.

2. vllurbine apparatus comprising in com bination, an exhaust casing and a turlaine cylinder entirely l supported thereby and flexibly connected therewith.

3. Turbine apparatus comprising in (LOIIle hination an exhaust casing and a turbine cylinder integrally joined therewith by a portion havinggaeater flexibility than the body of the casing and cylindera i at. Turbine aimaratus comprising in combination a substantially rigid enhaust casi'ng' and substantially i'g'id turbine element flexibly joined-thereto by a flexible connec- Turl'line apparatuscomprising in eoin-' location a substantially rigidezrhaust cos 1 with and a turbine cylinder 'tlfi portion and flexibly naust casing.

"us comprising in min biuation on exhaust casing. a cirvnaniicren '1 -i v .tlally divided turbine cyhmler supported .ieoy, and a flexible connecting element .ovingz a 'glortion of a turbine cylinder joining the divisions of the cylinder and forming a steam passage in communication with the interior of the cylinder.

7. .ln'turbine apparatus the combination With 2L rigidly mounted exhaust casing and a rigidly mounted rotor bearing of a turbine cylinder flexibly secured to the exhaust casing and alined with the said bearing.

8. In turbine apparatus, the combination with a rigidly mounted exhaust casing and a rigidly mounted rotor bearing, of a turbine cylinder rigidly attached to the bearing and flexibly connected to the exhaust casin 9. In turbine apparatus, the combination with a rigidly mounted exhaust casing and a rigidly mounted rotor bearing, of a t ur-- bine cylinder attached at, one end to the bearing and flexibly attachedatthe opposite end to the exhaust casing.

10. Turbine apparatus comprising in combination an exhaust casing, a turbine cylinder and a flexible diaphragm connecting the exhaust casing with the steam cylinder.

11. Turbine apparatus comprising in eombination an exhaust casing, a turbine eylin- (ler flexibly secured thereto so as to permit 

